feat(config): Start config lexicon

[nickvergessen]

🛠️ API Checklist

Starting 1 config at a time, as not all are straight forward to add

🏁 Checklist

• ⛑️ Tests (unit and/or integration) are included or not possible
• 📘 API documentation in docs/ has been updated or is not required
• 🔖 Capability is added or not needed

[miaulalala]

Code looks good but I don't see the Lexicon used anywhere? Is the idea to inject the Lexicon into the IUserConfig later?

[nickvergessen]

Code looks good but I don't see the Lexicon used anywhere? Is the idea to inject the Lexicon into the IUserConfig later?

It's basically implicit. When you use IAppConfig or IUserConfig, and use getBool on something that is registered as Int, it will complain, etc.
Once we added all configs to the lexicon, we can also change the strictness of the lexicon, so it complains when you use a config key that is not defined.